Reducing the amount of PRTR-related substances and VOC released

VOCs such as xylene and ethylbenzene, which are used in paint coating, account for most of Komatsu's emissions of PRTR-regulated* substances. Though reductions in emissions in FY2012 were mostly due to reductions in production, the emission output level was improved as well. We plan to further reduce VOC emissions through approaches such as, (1) shifting to high solid paint, and (2) improving paint application rate.

*PRTR:Law designed to mandate the disclosure of the amount of specific chemical substances released into the environment to promote the management of such substances (The notification system based on the PRTR Law)

Names of Class I Designated Chemical Substances and the Amounts

Released and Transferred by Group Manufacturing Facilities in Japan

(handling 1 ton or more, or 0.5 ton or more for Class I Specified Chemical Substances) (applicable PRTR substances from April 2010)

(Unit: t)

NumberunderthePRTRLaw

Name

Amounthandled

Amount released

Amounttransferred

Chemicallytransformedoreliminated

AmountContainedinProducts

Air

Water

Soil

Buried

Sewage

Waste

412

Manganese and its compounds

560.8

1.1

-

-

-

-

15.6

-

544.1

80

Xylene

357.4

260.5

-

-

-

-

21.2

73.7

2.1

53

Ethylbenzene

220.1

193.4

-

-

-

-

12.7

13.6

0.3

87

Chromium and chromium(III) compounds

162.1

0.0

-

-

-

-

1.7

-

160.4

300

Toluene

120.8

93.9

-

-

-

-

18.5

6.1

2.4

438

Methylnaphthalene

102.2

4.3

-

-

-

-

-

91.6

6.2

453

Molybdenum andits compounds

45.1

0.0

-

-

-

-

0.0

-

45.1

448

Methylenebis (4,1phenylene) = diisocyanate

32.2

0.0

-

-

-

-

0.0

31.9

0.2

296

1,2,4-trimethylbenzene

31.8

9.2

-

-

-

-

1.0

20.9

0.8

308

Nickel

21.5

0.0

-

-

-

-

0.4

-

21.2

88

Chromium (VI)compounds *1 *2

11.8

0.0

-

-

-

-

2.9

-

0.0

321

Vanadium compounds

9.0

-

-

-

-

-

-

-

9.0

277

Triethylamine

9.0

1.8

-

-

-

-

0.0

7.1

-

297

1,3,5-trimethylbenzene

8.2

4.0

-

-

-

-

0.5

3.7

-

132

Cobalt and its compounds

8.1

-

-

-

-

-

1.1

-

7.0

392

n-hexane

5.8

3.4

-

-

-

-

0.0

1.5

0.9

188

N,N-dicyclohexylamine

5.0

0.3

0.0

-

-

-

4.2

0.2

0.1

349

Phenol *3

4.4

0.4

-

-

-

-

-

4.0

-

258

1,3,5,7-tetraazatricyclo[3,3,1,1(3,7)] decane *3

4.2

-

-

-

-

-

-

4.1

0.1

405

Boroncompounds

3.3

-

-

-

-

-

2.1

1.2

0.1

207

2,6-Di-tert-butyl-4-methylphenol

3.0

1.0

0.0

-

-

-

0.4

0.0

1.5

302

Naphthalene

2.8

1.3

-

-

-

0.0

0.3

1.1

-

71

Ferricchloride

2.4

-

-

-

-

-

2.4

-

-

1

Zinc compounds(water- soluble)

1.0

-

-

-

-

-

0.0

-

1.0

*1: During chrome plating, chromium (VI) compounds become chromium compounds. Therefore, the amount transferred and the amount contained in products are entered as chromium and chromium(III) compounds.
*2: PRTR Class I Specified Chemical Substances
*3: Although the amount contained is below the amount that requires registration with the PRTR, we report the data because the amount released exceeds one ton.